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EGE Liquid Flow Sensor STK Series Probe

  • Liquid flow probe for water or oils
  • Available with a ¼” or ½” BSP connection
  • Short threaded version

The EGE series STK is a liquid flow probe which operates on the thermodynamic principle available with a ¼” or ½” BSP connection with sensor lengths either 25mm or 31mm.

When used with water the STK series probe has a detection range of 1 to 150 centimetres per second (cm/s), when used with oils this is 3 to 300 cm/s.

EGE STK series probes have a typical start up times from 2 to 15 seconds and a reaction time of 1 to 13 seconds. Maximum pressure ratings are up to 100 bar.

Dependant on model the STK series has an IP67 or IP68 ingress rating.

STK probes either have a 2 metre cable or M12 connector, wetted parts are all 316 stainless steel.

STK probes can be used with the SKM or SKZ series of amplifiers.


Common process applications and industrial uses include:

  • Cooling water
  • Cooling lubricants
  • Metal processing (cooling on rolling mills)
  • Pump run dry protection
  • Filter monitoring
  • Monitoring of process flows
  • CIP/SIP processes

Model numbers

  • EGE-STK 421KH-A4
  • EGE-STK421K-A4
  • EGE-STK421-KH-A4

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